US20090296303A1 - Overvoltage Protection Plug - Google Patents
Overvoltage Protection Plug Download PDFInfo
- Publication number
- US20090296303A1 US20090296303A1 US12/473,087 US47308709A US2009296303A1 US 20090296303 A1 US20090296303 A1 US 20090296303A1 US 47308709 A US47308709 A US 47308709A US 2009296303 A1 US2009296303 A1 US 2009296303A1
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- United States
- Prior art keywords
- protection plug
- overvoltage protection
- chassis
- gas tube
- interior volume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000004224 protection Effects 0.000 title claims abstract description 146
- 238000003780 insertion Methods 0.000 claims abstract description 48
- 230000037431 insertion Effects 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6666—Structural association with built-in electrical component with built-in electronic circuit with built-in overvoltage protection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
- H01R13/6335—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only comprising a handle
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/06—Mounting arrangements for a plurality of overvoltage arresters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/11—Protection against environment
- H04Q1/116—Protection against environment lightning or EMI protection, e.g. shielding or grounding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/14—Distribution frames
- H04Q1/144—Plugs used in distribution frames
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
Definitions
- the present disclosure relates generally to circuit protection in communications system; more particularly, the present disclosure relates to an overvoltage protection plug usable in conjunction with a connection block.
- Telecommunications systems generally include connection and disconnection systems, through which various types of telecommunications equipment are interconnected. Such systems generally require electrical protection, such as to prevent overvoltage and overcurrent events from damaging equipment, as can occur in the case of lightning strikes, power surges, or other electrical events.
- electrical protection such as to prevent overvoltage and overcurrent events from damaging equipment, as can occur in the case of lightning strikes, power surges, or other electrical events.
- gas tube and solid state overvoltage protection components exist and are used in these telecommunications systems.
- connection block One piece of equipment used for connection of telecommunications systems is referred to herein as a connection block, sometimes referred to as a “Krone-style connector block”, such as those manufactured by ADC GmbH, formerly Krone GmbH.
- connection block sometimes referred to as a “Krone-style connector block”, such as those manufactured by ADC GmbH, formerly Krone GmbH.
- Such systems include a high density array of electrical connectors in a punch-down configuration, and are designed to accept overvoltage and overcurrent protection devices to protect the telecommunications equipment connected to the output side of the telecommunications circuit connected via the block. Because of the large number of wires being connected in a small area in a connection block, a small form factor circuit protection element is dictated. Other design requirements and failsafe protections may also limit the applicability of various gas tube and solid state protection devices. For example, gas tube overvoltage protection systems are disadvantaged in that, for higher voltage applications, the gas tube required increases in size. Additionally, cost reduction considerations require minimization of the number
- the present disclosure relates generally to an overvoltage protection plug used in conjunction with a connection block.
- the overvoltage protection plug utilizes a gas tube rated sufficiently to meet various voltage safety certification requirements, and is configured to fit into a connection block while avoiding physical interference with neighboring circuit protection elements or connection locations.
- an overvoltage protection plug includes a protection plug body formed from a chassis and a housing and defining an interior volume, the protection plug body including an insertion portion and a handle.
- the overvoltage protection plug further includes a gas tube located within the interior volume, the gas tube electrically connected to metallic leads protruding through the body at the insertion portion.
- the overvoltage protection plug also includes a grounding plate electrically connected to a ground pin of the gas tube.
- a method of assembling an overvoltage protection plug includes mounting a gas tube to a chassis, and electrically connecting the gas tube to metallic leads, the metallic leads extending through the chassis.
- the method further includes inserting at least a portion of the chassis into a housing to form a body for the overvoltage protection plug, the body including an interior volume, and wherein the gas tube resides within the interior volume and the metallic leads extending through the chassis and are exposed external to the body.
- the method further includes filling the interior volume with gel, thereby environmentally protecting the interior volume of the overvoltage protection plug.
- an overvoltage protection plug includes a protection plug body formed from a chassis and a housing and defining an interior volume, the protection plug body including an insertion portion and a handle.
- the overvoltage protection plug also includes a gas tube located within the interior volume and a plurality of metallic leads electrically connected to the gas tube, the plurality of metallic leads extending through slots in the chassis for electrical connection to a connection block.
- the overvoltage protection plug includes a grounding plate electrically connected to a grounding pin of the gas tube, and a gel surrounding the gas tube within the interior volume and arranged to protect the gas tube from environmental conditions surrounding the overvoltage protection plug.
- an overvoltage protection plug includes a protection plug body formed from a chassis and a housing and defining an interior volume, the protection plug body including an insertion portion and a handle.
- the overvoltage protection plug also includes a gas tube located within the interior volume, the gas tube including electrically connected to conductive contacts within the interior volume, the conductive contacts protruding through the body at the insertion portion.
- the protection plug body includes a gel access opening for providing access to the interior volume.
- an overvoltage protection plug includes a chassis including an insertion portion arranged to be received into a connection block.
- the chassis includes a plurality of slots arranged to receive conductive leads, the slots extending through the chassis and oriented toward the insertion portion.
- the chassis further includes a grounding pin slot arranged to receive a grounding pin of a gas tube, and a guide member located between the slots and extending from the insertion portion.
- the chassis also includes a plurality of tabs defining a grounding plate mounting location on a top side of the chassis and a gel access opening extending through the chassis.
- a method of assembling an overvoltage protection plug includes electrically connecting each of a plurality of signal posts of a gas tube to conductive leads, the gas tube also including a grounding pin.
- the method further includes sliding the conductive leads through slots in the chassis and electrically connecting a grounding plate to the grounding pin on a side of the chassis opposite the gas tube.
- the method also includes inserting at least a portion of the chassis into a housing to form a snap-fit connection, the chassis and housing forming a body for the overvoltage protection plug.
- the method includes filling an interior volume of the overvoltage protection plug with gel through a gel access opening in the chassis, wherein the gel is arranged to protect the gas tube from environmental conditions.
- FIG. 1 is a right side perspective view of an overvoltage protection plug, in accordance with a possible embodiment of the present disclosure
- FIG. 2 is a left side perspective view of the overvoltage protection plug of FIG. 1 ;
- FIG. 3 is a left side plan view of the overvoltage protection plug of FIG. 1 ;
- FIG. 4 is a right side plan view of the overvoltage protection plug of FIG. 1 ;
- FIG. 5 is a top plan view of the overvoltage protection plug of FIG. 1 ;
- FIG. 6 is a bottom plan view of the overvoltage protection plug of FIG. 1 ;
- FIG. 7 is an insertion side plan view of the overvoltage protection plug of FIG. 1 ;
- FIG. 8 is a handle-side plan view of the overvoltage protection plug of FIG. 1 ;
- FIG. 9 is a right side partially exploded view of the overvoltage protection plug of FIG. 1 , illustrating insertion of a chassis into a housing;
- FIG. 10 is a right side plan view of the overvoltage protection plug of FIG. 9 ;
- FIG. 11 is a right side partially exploded view of the overvoltage protection plug of FIG. 1 , illustrating connection of a grounding plate within the plug;
- FIG. 12 is a right side plan view of the overvoltage protection plug of FIG. 11 ;
- FIG. 13 is a right side perspective exploded view of the overvoltage protection plug of FIG. 1 ;
- FIG. 14 is a right side plan exploded view of the overvoltage protection plug of FIG. 13 ;
- FIG. 15 is an insertion side plan view of the overvoltage protection plug illustrating cross-sectional axes for FIGS. 16-18 ;
- FIG. 16 is a cross-sectional view of the overvoltage protection plug of FIG. 15 along axis A;
- FIG. 17 is a cross-sectional view of the overvoltage protection plug of FIG. 15 along axis B;
- FIG. 18 is a cross-sectional view of the overvoltage protection plug of FIG. 15 along axis C;
- FIG. 19 is a right side perspective view of a chassis useable in the overvoltage protection plug of FIG. 1 ;
- FIG. 20 is a top plan view of the chassis of FIG. 19 ;
- FIG. 21 is a bottom plan view of the chassis of FIG. 19 ;
- FIG. 22 is a left side plan view of the chassis of FIG. 19 ;
- FIG. 23 is a right side plan view of the chassis of FIG. 19 ;
- FIG. 24 is an insertion side plan view of the chassis of FIG. 19 ;
- FIG. 25 is an internal side plan view of the chassis of FIG. 19 ;
- FIG. 26 is a right side perspective view of a housing useable in the overvoltage protection plug of FIG. 1 ;
- FIG. 27 is a top plan view of the housing of FIG. 26 ;
- FIG. 28 is a bottom plan view of the housing of FIG. 26 ;
- FIG. 29 is a left side plan view of the housing of FIG. 26 ;
- FIG. 30 is a right side plan view of the housing of FIG. 26 ;
- FIG. 31 is an insertion side plan view of the housing of FIG. 26 ;
- FIG. 32 is a handle side plan view of the housing of FIG. 26 ;
- FIG. 33 is a top plan view of a gas tube useable as an overvoltage protection device in the overvoltage protection plug of FIG. 1 ;
- FIG. 34 is a bottom plan view of the gas tube of FIG. 33 ;
- FIG. 35 is side plan view of the gas tube of FIG. 33 ;
- FIG. 36 is a further side plan view of the gas tube of FIG. 33 , perpendicular to the view of FIG. 35 ;
- FIG. 37 is a side plan view of the gas tube of FIG. 33 , opposite the side shown in FIG. 35 ;
- FIG. 38 is a perspective view of an electrical contact useable in the overvoltage protection plug of FIG. 1 ;
- FIG. 39 is a top side plan view of the electrical contact of FIG. 38 ;
- FIG. 40 is a bottom side plan view of the electrical contact of FIG. 38 ;
- FIG. 41 is a left side plan view of the electrical contact of FIG. 38 ;
- FIG. 42 is a right side plan view of the electrical contact of FIG. 38 ;
- FIG. 43 is an insertion side plan view of the electrical contact of FIG. 38 ;
- FIG. 44 is a side plan view of the electrical contact of FIG. 38 , opposite the insertion side;
- FIG. 45 is a perspective view of a second electrical contact useable in the overvoltage protection plug of FIG. 1 ;
- FIG. 46 is a top side plan view of the electrical contact of FIG. 45 ;
- FIG. 47 is a bottom side plan view of the electrical contact of FIG. 45 ;
- FIG. 48 is a left side plan view of the electrical contact of FIG. 45 ;
- FIG. 49 is a right side plan view of the electrical contact of FIG. 45 ;
- FIG. 50 is an insertion side plan view of the electrical contact of FIG. 45 ;
- FIG. 51 is a side plan view of the electrical contact of FIG. 45 , opposite the insertion side;
- FIG. 52 is a perspective view of a grounding plate useable in the overvoltage protection plug of FIG. 1 ;
- FIG. 53 is a top plan view of the grounding plate of FIG. 52 ;
- FIG. 54 is a bottom plan view of the grounding plate of FIG. 52 ;
- FIG. 55 is a left side plan view of the grounding plate of FIG. 52 ;
- FIG. 56 is a right side plan view of the grounding plate of FIG. 52 ;
- FIG. 57 is an insertion side plan view of the grounding plate of FIG. 52 ;
- FIG. 58 is a further side plan view of the grounding plate of FIG. 52 , opposite the insertion side;
- FIG. 59 is a right side perspective view of an overvoltage protection plug, in accordance with a further possible embodiment of the present disclosure.
- FIG. 60 is a right side partially exploded view of the overvoltage protection plug of FIG. 59 , illustrating insertion of a chassis into a housing;
- FIG. 61 is a right side partially exploded view of the overvoltage protection plug of FIG. 59 , illustrating connection of a grounding plate within the plug;
- FIG. 62 is a right side perspective exploded view of the overvoltage protection plug of FIG. 59 ;
- FIG. 63 is a cross-sectional view of the overvoltage protection plug of FIG. 59 along corresponding axis B as illustrated in FIG. 15 ;
- FIG. 64 is a top plan view of the overvoltage protection plug of FIG. 59 ;
- FIG. 65 is a bottom plan view of the overvoltage protection plug of FIG. 59 ;
- FIG. 66 is a handle-side plan view of the overvoltage protection plug of FIG. 59 ;
- an overvoltage protection plug 10 is disclosed.
- the plug 10 provides overvoltage protection for telecommunications circuits, such as due to lightning strikes, power surges, or other unexpected events occurring within the telecommunications circuits.
- the plug 10 is configured for insertion into a connection block, such as a Krone-style connection block widely used in telecommunication interconnection systems, which include an array of connection locations and can be arranged in a number of adjacent rows.
- the plug 10 includes a body 12 formed from a chassis 14 and a housing 16 .
- the body 12 has a top 13 , bottom 15 , right and left sides 18 , 20 , respectively.
- the body 12 also defines an insertion side 22 and a handle side 24 at opposite sides along its length.
- the size of the body 12 is minimized, at least with respect to the dimensions from the top 13 to bottom 15 and right to left (sides 18 and 20 , respectively). This maximizes the circuit density of connection blocks in which the plug can be located.
- the body 12 is approximately 0.31 inches wide by approximately 0.49 inches tall by approximately 1.44 inches long.
- two conductive contacts 26 , 28 extend through the body at the insertion side 22 , and are positioned to make contact with and electrically connect to electrical contacts in a high contact density connection block, such as a Krone-style connection block.
- a high contact density connection block such as a Krone-style connection block.
- Example Krone-style blocks useable in conjunction with the plug 10 are disclosed in German Patent No. DE3728368 and German Patent Application No. DE10001553. Additional details are described in U.S. Pat. Nos. 7,147,412; 7,008,243; 5,494,461; 5,163,855; 5,033,974; and 4,871,330, the disclosures of which are hereby incorporated by reference in their entireties.
- the chassis 14 and housing 16 interconnect to form the body 12 via a snap-fit arrangement, in which tabs 30 arranged on a portion of the chassis inserted into the housing fit within openings 32 in the housing.
- Other arrangements for interconnecting the chassis 14 and housing 16 are possible as well, such as use of an adhesive, fastener, or other structure. Additional details of the chassis and housing are discussed below in conjunction with FIGS. 19-32 .
- the plug 10 includes an interior volume 34 in which electrical components, such as circuit protection components, can be housed.
- the plug 10 includes a gas tube 36 residing within the interior volume 34 .
- the gas tube 36 is generally a three pin gas tube, having two signal leads 38 and a grounding pin 40 .
- the gas tube 36 generally activates upon detection of overvoltage events occurring between the conductive contacts. When the gas tube 36 activates, an electrical connection forms due to electrical excitement of the gas within the gas tube, connecting one or both of the signal leads 38 of the gas tube (connected to the electrical contacts) to the grounding pin 40 , thereby neutralizing the overvoltage event. Additional details regarding the gas tube are described below in conjunction with FIGS. 33-37 .
- the gas tube 36 is electrically connected to the conductive contacts 26 , 28 .
- the conductive contacts 26 , 28 can be electrically connected to the signal leads 38 of the gas tube via a soldered connection; however, solderless connection arrangements are possible as well.
- the gas tube 36 also electrically connects to a grounding plate 42 .
- the grounding plate 42 is held apart from the gas tube 36 by a portion of the chassis 14 , which allows the grounding pin 40 of the gas tube 36 to slide through the chassis to a mounting position.
- a grounding opening 44 in the body 12 allows external access to the grounding plate, to allow electrical connection of the grounding plate to a ground bar, such as a grounding bar associated with a connection block.
- a gel access opening 46 extends through the body 12 as well.
- the gel access opening 46 allows access to the interior volume 34 of the plug 10 .
- a gel can be added into the interior volume 34 to environmentally protect components within the interior volume 34 .
- the gel access opening 46 generally allows gel to be provided into the interior volume 34 to a predetermined volume, such as the predetermined fill level 41 shown in FIG. 16 .
- the gel access opening 46 also allows the gel to expand through the opening.
- the gel access opening 46 passes through the chassis 14 at the insertion side 22 of the plug 10 ; in other embodiments, the gel access opening 46 can be located at another location on the body 12 , such as through a portion of the housing 16 .
- the chassis 14 includes an insertion portion 48 that is configured to be inserted into a protection block.
- the insertion portion 48 includes a plurality of protrusions 47 configured to interconnect with a connection block and retain the overvoltage protection plug 10 within the block.
- the chassis 14 also includes an interior portion 50 that resides within the housing 16 and is configured to allow mounting of electrical components, such as the gas tube 36 , grounding plate 42 , and conductive contacts 26 , 28 .
- the interior portion 50 includes tabs 30 along a perimeter portion arranged to interconnect with the openings 32 in the housing to form a snap-fit construction. In the embodiment shown, two tabs 30 are located on the left and right sides of the chassis 14 ; however, more or fewer tabs can be included on the chassis 14 as well.
- the chassis 14 includes slots 52 extending through the chassis 14 from the interior portion 50 toward left and right sides of the insertion portion 48 .
- the slots 52 are sized to receive the conductive contacts 26 , 28 , which are exposed at the insertion portion 48 external to the body 12 while electrically connecting to the gas tube 34 within the interior volume 34 .
- the insertion portion 48 also includes a central guide extension 49 that physically and electrically separates the conductive contacts 26 , 28 .
- the chassis also includes a central pin receiving slot 54 normal to the slots 52 and arranged to accept insertion of the grounding pin 40 of the gas tube 36 , for connection to the grounding plate 42 .
- Tabs 56 on a top side of the chassis 14 define a mounting location for the grounding plate, and retain the grounding plate 42 in place when the overvoltage protection plug 10 is assembled.
- the chassis 14 includes the gel access opening 46 located below the insertion portion 48 , as previously described.
- the housing 16 defines a portion of the body 12 including at least a portion of the left and right sides 18 , 20 of the body as well as the handle side 24 of the body.
- the housing 16 defines the interior volume 34 , and includes an opening 35 that is sized to receive the chassis 14 and associated internal electrical components (e.g. a gas tube 36 , grounding plate 42 , and conductive contacts 26 , 28 ).
- the housing 16 is generally rectangular, but includes angled corners 58 connecting the bottom side 15 to the left and right sides 18 , 20 , respectively, to ensure consistent, proper orientation of the overvoltage protection plug when inserted into a socket or connection block.
- An example connection block used in conjunction with such a keyed housing is disclosed in U.S.
- the housing 16 includes tab receiving openings 32 near the opening 35 that are configured to receive the tabs 30 of the chassis to form a snap-fit connection.
- the openings 32 are generally numbered and positioned in a manner complementary to the tabs 30 , such that each tab has a corresponding opening.
- the housing 16 defines a handle 60 shaped to be manually gripped for insertion and removal of the overvoltage protection plug 10 from a socket, connection block, or other insertion location.
- the handle 60 includes a plurality of ridges 61 to assist with manual gripping of the plug 10 .
- the handle 60 can also be shaped to accept use of a punch down tool for insertion or removal of the plug 10 .
- the handle can include a hook-shaped portion for receiving a portion of such a tool.
- the punch down tool (not shown) can be used to insert or remove the overvoltage protection plug 10 , due in part to the sizing and positioning of the handle 60 at the handle portion of the housing 16 , extending rearwardly from the plug.
- an example punch down tool can be any of a variety of tools include a gripping portion (for example, a hook), such as a punch down tool distributed by ADC Krone GmbH.
- a gripping portion for example, a hook
- An example punch down tool is described in U.S. Pat. No. 4,434,542, the disclosure of which is hereby incorporated by reference in its entirety.
- the gas tube 36 is a three-pin gas tube, and, as previously mentioned, includes two signal leads 38 and a grounding pin 40 .
- the gas tube 36 is generally cylindrical, and the signal leads 38 extend from opposing ends of the cylinder.
- the grounding pin 40 extends from a central location along the cylindrical shape of the gas tube 36 .
- the gas tube 36 can be any of a variety of sizes.
- the gas tube 34 is a gas discharge tube rated to meet electrical specifications of Underwriter's Laboratories, Telcordia, or another electrical safety specification appropriate to the region in which the plug 10 is used.
- Such gas discharge tubes can be any of a number of gas tubes manufactured by Bourns or other gas discharge tube manufacturer.
- the gas tube has a diameter of approximately 5 mm.
- other sizes of gas tubes may be used as well to ensure that the necessary electrical specifications are met for use of the plug 10 .
- the gas tube 36 includes a melt element 62 along the length of the tube.
- the melt element operates to permanently connect the signal leads 38 to the grounding pin 40 if a prolonged overvoltage event is detected.
- the gas tube 36 is activated for a long period of time, causing the temperature of the gas tube to rise, melting the melt element and causing a short circuit between the signal leads 38 and the grounding pin 38 .
- a first conductive contact 26 connects from the signal lead 38 of the gas tube 36 that resides within the housing 16 nearer to the handle 60 , and extends through the chassis 14 to be exposed along the right side of the insertion portion.
- the conductive contact 26 includes a connection portion 27 configured for electrical connection to a signal lead 38 from the gas tube 36 , and a lead portion 29 configured to extend through the slot 54 in the chassis.
- the second conductive contact 28 shown in FIGS.
- connection portion 27 ′ includes a corresponding connection portion 27 ′ and lead portion 29 ′ connects from the signal lead 38 of the gas tube 36 that is nearer to the insertion portion through the chassis, and is exposed along the left side of the insertion portion.
- the conductive contacts 26 , 28 can be soldered or otherwise electrically connected to the signal leads 38 using the connection portions 27 , 31 .
- FIGS. 52-58 illustrate additional details of the grounding plate 42 mounted to the chassis 14 within the body 12 .
- the grounding plate 42 includes a grounding extension 64 connected to a connection portion 66 , which includes a connection location 68 for electrically connecting the grounding plate to the grounding pin 40 of the gas tube 36 .
- the connection portion is substantially rectangular, to be held in place by the tabs 56 on the top side of the chassis.
- the connection location 68 includes an H-clip configuration, forming a solderless electrical connection to the grounding pin 40 of the gas tube 36 .
- a soldered connection could be used instead.
- a manufacturer can mount a gas tube to a chassis, such as by sliding one or more pins of the gas tube (e.g. the grounding pin 40 or signal leads 38 ) into a slot of the chassis arranged to accommodate the gas tube.
- Metallic leads such as the conductive contacts 26 , 28 , are electrically connected to the signal leads 38 of the gas tube 36 , and inserted through slots in the chassis to extend toward an insertion side of the chassis.
- the conductive contacts 26 , 28 can be soldered to the signal leads 38 of the gas tube 36 .
- a grounding plate 42 is electrically connected to the grounding pin 40 of the gas tube 36 .
- the grounding plate is installed over the grounding pin, optionally such that a portion of the chassis 14 resides between the grounding plate 42 and the gas tube 36 .
- the interior portion 50 of the chassis 14 including the installed gas tube 36 , grounding plate 42 , and portions of the conductive contacts 26 , 28 , is inserted into the housing 16 to form a snap-fit connection, forming the overvoltage protection plug 10 .
- the interior volume of the formed plug 10 can be filled with a gel, such as by inserting the gel through a gel access opening in the body 12 of the plug.
- the gel surrounds the grounding plate 42 , conductive contacts 26 , 28 , and gas tube 36 , to environmentally protect the electrical components from moisture or other harmful external conditions.
- the overvoltage protection plug 10 is inserted into a connection block, thereby connecting two sets of contacts for a differential signal pair routed through the connection block.
- the overvoltage protection plug 10 detects overvoltage events, representing instances in which the voltage difference across the differential pair exceeds an acceptable, preset threshold value. When the voltage difference exceeds this threshold value (as determined by the specific voltage characteristics of the selected gas tube), one or both of the signal leads of the gas tube are shorted to the grounding pin of the gas tube, as described above in conjunction with FIGS. 33-37 , thereby protecting an overall differential signaling circuit.
- the overvoltage protection plug 100 generally includes corresponding features and functionality to plug 10 of FIGS. 1-58 , and further includes test access openings in the housing 14 and chassis 16 .
- the test access openings described in further detail below, allow access to signals protected by plug 100 by a technician (e.g., while the plug is installed in a connection block).
- contacts 126 , 128 replace contacts 26 , 28 of FIGS. 1-58 , and include test access lead portions 126 ′, 128 ′, respectively, extending to the handle side of the interior volume 34 of the housing 14 .
- the test access lead portions 126 ′, 128 ′ are formed from an elongated metal contact folded upon itself and extending to the handle side 24 of the plug 100 (as compared to contacts 26 , 28 ).
- a pair of test access openings 102 a - b are located in the handle 60 of the housing 14 , and allow a technician to access contacts 126 , 128 and monitor signals thereon.
- a ground access opening 104 is located through the chassis 16 proximate to the protrusions 47 , and allows connective test access to a grounding bar connected to the grounding plate 42 when the plug 100 is inserted into a connection block.
- the ground access opening 104 extends through the chassis such that grounding access is available from either side of the plug 100 .
- an overvoltage protection plug Although certain particular methods of construction and operation of an overvoltage protection plug are described herein, other methods of construction and operation are possible as well. Furthermore, the various steps described to construct an overvoltage protection plug are not required to be performed in a specific order, and no order is imputed by this description.
- overvoltage protection plug 10 terms such as, “top”, “bottom”, and “side” and words related thereto are used for ease of description and illustration, no restriction is intended by use of such terms.
- the plug 10 can be positioned in any orientation.
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Abstract
Description
- The present application claims priority to U.S. Provisional Patent Application No. 61/056,328, filed May 27, 2008, the disclosure of which is hereby incorporated by reference in its entirety.
- The present disclosure relates generally to circuit protection in communications system; more particularly, the present disclosure relates to an overvoltage protection plug usable in conjunction with a connection block.
- Telecommunications systems generally include connection and disconnection systems, through which various types of telecommunications equipment are interconnected. Such systems generally require electrical protection, such as to prevent overvoltage and overcurrent events from damaging equipment, as can occur in the case of lightning strikes, power surges, or other electrical events. Various types of gas tube and solid state overvoltage protection components exist and are used in these telecommunications systems.
- One piece of equipment used for connection of telecommunications systems is referred to herein as a connection block, sometimes referred to as a “Krone-style connector block”, such as those manufactured by ADC GmbH, formerly Krone GmbH. Such systems include a high density array of electrical connectors in a punch-down configuration, and are designed to accept overvoltage and overcurrent protection devices to protect the telecommunications equipment connected to the output side of the telecommunications circuit connected via the block. Because of the large number of wires being connected in a small area in a connection block, a small form factor circuit protection element is dictated. Other design requirements and failsafe protections may also limit the applicability of various gas tube and solid state protection devices. For example, gas tube overvoltage protection systems are disadvantaged in that, for higher voltage applications, the gas tube required increases in size. Additionally, cost reduction considerations require minimization of the number of components used.
- The present disclosure relates generally to an overvoltage protection plug used in conjunction with a connection block. The overvoltage protection plug utilizes a gas tube rated sufficiently to meet various voltage safety certification requirements, and is configured to fit into a connection block while avoiding physical interference with neighboring circuit protection elements or connection locations.
- According to a first aspect, an overvoltage protection plug is disclosed. The overvoltage protection plug includes a protection plug body formed from a chassis and a housing and defining an interior volume, the protection plug body including an insertion portion and a handle. The overvoltage protection plug further includes a gas tube located within the interior volume, the gas tube electrically connected to metallic leads protruding through the body at the insertion portion. The overvoltage protection plug also includes a grounding plate electrically connected to a ground pin of the gas tube.
- According to a second aspect, a method of assembling an overvoltage protection plug is disclosed. The method includes mounting a gas tube to a chassis, and electrically connecting the gas tube to metallic leads, the metallic leads extending through the chassis. The method further includes inserting at least a portion of the chassis into a housing to form a body for the overvoltage protection plug, the body including an interior volume, and wherein the gas tube resides within the interior volume and the metallic leads extending through the chassis and are exposed external to the body. In certain cases, the method further includes filling the interior volume with gel, thereby environmentally protecting the interior volume of the overvoltage protection plug.
- According to a third aspect, an overvoltage protection plug is disclosed. In this aspect, the overvoltage protection plug includes a protection plug body formed from a chassis and a housing and defining an interior volume, the protection plug body including an insertion portion and a handle. The overvoltage protection plug also includes a gas tube located within the interior volume and a plurality of metallic leads electrically connected to the gas tube, the plurality of metallic leads extending through slots in the chassis for electrical connection to a connection block. The overvoltage protection plug includes a grounding plate electrically connected to a grounding pin of the gas tube, and a gel surrounding the gas tube within the interior volume and arranged to protect the gas tube from environmental conditions surrounding the overvoltage protection plug.
- According to a further aspect, an overvoltage protection plug is disclosed. The overvoltage protection plug includes a protection plug body formed from a chassis and a housing and defining an interior volume, the protection plug body including an insertion portion and a handle. The overvoltage protection plug also includes a gas tube located within the interior volume, the gas tube including electrically connected to conductive contacts within the interior volume, the conductive contacts protruding through the body at the insertion portion. The protection plug body includes a gel access opening for providing access to the interior volume.
- According to a still further aspect, an overvoltage protection plug is disclosed. The overvoltage protection plug includes a chassis including an insertion portion arranged to be received into a connection block. The chassis includes a plurality of slots arranged to receive conductive leads, the slots extending through the chassis and oriented toward the insertion portion. The chassis further includes a grounding pin slot arranged to receive a grounding pin of a gas tube, and a guide member located between the slots and extending from the insertion portion. The chassis also includes a plurality of tabs defining a grounding plate mounting location on a top side of the chassis and a gel access opening extending through the chassis.
- According to another aspect, a method of assembling an overvoltage protection plug is disclosed. The method includes electrically connecting each of a plurality of signal posts of a gas tube to conductive leads, the gas tube also including a grounding pin. The method further includes sliding the conductive leads through slots in the chassis and electrically connecting a grounding plate to the grounding pin on a side of the chassis opposite the gas tube. The method also includes inserting at least a portion of the chassis into a housing to form a snap-fit connection, the chassis and housing forming a body for the overvoltage protection plug. The method includes filling an interior volume of the overvoltage protection plug with gel through a gel access opening in the chassis, wherein the gel is arranged to protect the gas tube from environmental conditions.
-
FIG. 1 is a right side perspective view of an overvoltage protection plug, in accordance with a possible embodiment of the present disclosure; -
FIG. 2 is a left side perspective view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 3 is a left side plan view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 4 is a right side plan view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 5 is a top plan view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 6 is a bottom plan view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 7 is an insertion side plan view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 8 is a handle-side plan view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 9 is a right side partially exploded view of the overvoltage protection plug ofFIG. 1 , illustrating insertion of a chassis into a housing; -
FIG. 10 is a right side plan view of the overvoltage protection plug ofFIG. 9 ; -
FIG. 11 is a right side partially exploded view of the overvoltage protection plug ofFIG. 1 , illustrating connection of a grounding plate within the plug; -
FIG. 12 is a right side plan view of the overvoltage protection plug ofFIG. 11 ; -
FIG. 13 is a right side perspective exploded view of the overvoltage protection plug ofFIG. 1 ; -
FIG. 14 is a right side plan exploded view of the overvoltage protection plug ofFIG. 13 ; -
FIG. 15 is an insertion side plan view of the overvoltage protection plug illustrating cross-sectional axes forFIGS. 16-18 ; -
FIG. 16 is a cross-sectional view of the overvoltage protection plug ofFIG. 15 along axis A; -
FIG. 17 is a cross-sectional view of the overvoltage protection plug ofFIG. 15 along axis B; -
FIG. 18 is a cross-sectional view of the overvoltage protection plug ofFIG. 15 along axis C; -
FIG. 19 is a right side perspective view of a chassis useable in the overvoltage protection plug ofFIG. 1 ; -
FIG. 20 is a top plan view of the chassis ofFIG. 19 ; -
FIG. 21 is a bottom plan view of the chassis ofFIG. 19 ; -
FIG. 22 is a left side plan view of the chassis ofFIG. 19 ; -
FIG. 23 is a right side plan view of the chassis ofFIG. 19 ; -
FIG. 24 is an insertion side plan view of the chassis ofFIG. 19 ; -
FIG. 25 is an internal side plan view of the chassis ofFIG. 19 ; -
FIG. 26 is a right side perspective view of a housing useable in the overvoltage protection plug ofFIG. 1 ; -
FIG. 27 is a top plan view of the housing ofFIG. 26 ; -
FIG. 28 is a bottom plan view of the housing ofFIG. 26 ; -
FIG. 29 is a left side plan view of the housing ofFIG. 26 ; -
FIG. 30 is a right side plan view of the housing ofFIG. 26 ; -
FIG. 31 is an insertion side plan view of the housing ofFIG. 26 ; -
FIG. 32 is a handle side plan view of the housing ofFIG. 26 ; -
FIG. 33 is a top plan view of a gas tube useable as an overvoltage protection device in the overvoltage protection plug ofFIG. 1 ; -
FIG. 34 is a bottom plan view of the gas tube ofFIG. 33 ; -
FIG. 35 is side plan view of the gas tube ofFIG. 33 ; -
FIG. 36 is a further side plan view of the gas tube ofFIG. 33 , perpendicular to the view ofFIG. 35 ; -
FIG. 37 is a side plan view of the gas tube ofFIG. 33 , opposite the side shown inFIG. 35 ; -
FIG. 38 is a perspective view of an electrical contact useable in the overvoltage protection plug ofFIG. 1 ; -
FIG. 39 is a top side plan view of the electrical contact ofFIG. 38 ; -
FIG. 40 is a bottom side plan view of the electrical contact ofFIG. 38 ; -
FIG. 41 is a left side plan view of the electrical contact ofFIG. 38 ; -
FIG. 42 is a right side plan view of the electrical contact ofFIG. 38 ; -
FIG. 43 is an insertion side plan view of the electrical contact ofFIG. 38 ; -
FIG. 44 is a side plan view of the electrical contact ofFIG. 38 , opposite the insertion side; -
FIG. 45 is a perspective view of a second electrical contact useable in the overvoltage protection plug ofFIG. 1 ; -
FIG. 46 is a top side plan view of the electrical contact ofFIG. 45 ; -
FIG. 47 is a bottom side plan view of the electrical contact ofFIG. 45 ; -
FIG. 48 is a left side plan view of the electrical contact ofFIG. 45 ; -
FIG. 49 is a right side plan view of the electrical contact ofFIG. 45 ; -
FIG. 50 is an insertion side plan view of the electrical contact ofFIG. 45 ; -
FIG. 51 is a side plan view of the electrical contact ofFIG. 45 , opposite the insertion side; -
FIG. 52 is a perspective view of a grounding plate useable in the overvoltage protection plug ofFIG. 1 ; -
FIG. 53 is a top plan view of the grounding plate ofFIG. 52 ; -
FIG. 54 is a bottom plan view of the grounding plate ofFIG. 52 ; -
FIG. 55 is a left side plan view of the grounding plate ofFIG. 52 ; -
FIG. 56 is a right side plan view of the grounding plate ofFIG. 52 ; -
FIG. 57 is an insertion side plan view of the grounding plate ofFIG. 52 ; -
FIG. 58 is a further side plan view of the grounding plate ofFIG. 52 , opposite the insertion side; -
FIG. 59 is a right side perspective view of an overvoltage protection plug, in accordance with a further possible embodiment of the present disclosure; -
FIG. 60 is a right side partially exploded view of the overvoltage protection plug ofFIG. 59 , illustrating insertion of a chassis into a housing; -
FIG. 61 is a right side partially exploded view of the overvoltage protection plug ofFIG. 59 , illustrating connection of a grounding plate within the plug; -
FIG. 62 is a right side perspective exploded view of the overvoltage protection plug ofFIG. 59 ; -
FIG. 63 is a cross-sectional view of the overvoltage protection plug ofFIG. 59 along corresponding axis B as illustrated inFIG. 15 ; -
FIG. 64 is a top plan view of the overvoltage protection plug ofFIG. 59 ; -
FIG. 65 is a bottom plan view of the overvoltage protection plug ofFIG. 59 ; -
FIG. 66 is a handle-side plan view of the overvoltage protection plug ofFIG. 59 ; - Referring to
FIGS. 1-8 , anovervoltage protection plug 10 is disclosed. Theplug 10 provides overvoltage protection for telecommunications circuits, such as due to lightning strikes, power surges, or other unexpected events occurring within the telecommunications circuits. Theplug 10 is configured for insertion into a connection block, such as a Krone-style connection block widely used in telecommunication interconnection systems, which include an array of connection locations and can be arranged in a number of adjacent rows. - The
plug 10 includes abody 12 formed from achassis 14 and ahousing 16. Thebody 12 has a top 13, bottom 15, right and leftsides body 12 also defines aninsertion side 22 and ahandle side 24 at opposite sides along its length. The size of thebody 12 is minimized, at least with respect to the dimensions from the top 13 to bottom 15 and right to left (sides body 12 is approximately 0.31 inches wide by approximately 0.49 inches tall by approximately 1.44 inches long. - In the embodiment shown, two
conductive contacts insertion side 22, and are positioned to make contact with and electrically connect to electrical contacts in a high contact density connection block, such as a Krone-style connection block. Example Krone-style blocks useable in conjunction with theplug 10 are disclosed in German Patent No. DE3728368 and German Patent Application No. DE10001553. Additional details are described in U.S. Pat. Nos. 7,147,412; 7,008,243; 5,494,461; 5,163,855; 5,033,974; and 4,871,330, the disclosures of which are hereby incorporated by reference in their entireties. - The
chassis 14 andhousing 16 interconnect to form thebody 12 via a snap-fit arrangement, in whichtabs 30 arranged on a portion of the chassis inserted into the housing fit withinopenings 32 in the housing. Other arrangements for interconnecting thechassis 14 andhousing 16 are possible as well, such as use of an adhesive, fastener, or other structure. Additional details of the chassis and housing are discussed below in conjunction withFIGS. 19-32 . - Referring now also to
FIGS. 9-18 , further details regarding theovervoltage protection plug 10 are disclosed. As shown, theplug 10 includes aninterior volume 34 in which electrical components, such as circuit protection components, can be housed. In the embodiment shown, theplug 10 includes agas tube 36 residing within theinterior volume 34. Thegas tube 36 is generally a three pin gas tube, having two signal leads 38 and agrounding pin 40. Thegas tube 36 generally activates upon detection of overvoltage events occurring between the conductive contacts. When thegas tube 36 activates, an electrical connection forms due to electrical excitement of the gas within the gas tube, connecting one or both of the signal leads 38 of the gas tube (connected to the electrical contacts) to thegrounding pin 40, thereby neutralizing the overvoltage event. Additional details regarding the gas tube are described below in conjunction withFIGS. 33-37 . - The
gas tube 36 is electrically connected to theconductive contacts conductive contacts - The
gas tube 36 also electrically connects to agrounding plate 42. The groundingplate 42 is held apart from thegas tube 36 by a portion of thechassis 14, which allows thegrounding pin 40 of thegas tube 36 to slide through the chassis to a mounting position. Agrounding opening 44 in thebody 12 allows external access to the grounding plate, to allow electrical connection of the grounding plate to a ground bar, such as a grounding bar associated with a connection block. - A gel access opening 46 extends through the
body 12 as well. The gel access opening 46 allows access to theinterior volume 34 of theplug 10. A gel can be added into theinterior volume 34 to environmentally protect components within theinterior volume 34. The gel access opening 46 generally allows gel to be provided into theinterior volume 34 to a predetermined volume, such as thepredetermined fill level 41 shown inFIG. 16 . As the temperature of the gel increases due to operation of theovervoltage protection plug 10, the gel access opening 46 also allows the gel to expand through the opening. In the embodiment shown, the gel access opening 46 passes through thechassis 14 at theinsertion side 22 of theplug 10; in other embodiments, the gel access opening 46 can be located at another location on thebody 12, such as through a portion of thehousing 16. - Referring now to
FIGS. 19-25 , further details are disclosed regarding thechassis 14 useable in the example overvoltage protection plug. Thechassis 14 includes aninsertion portion 48 that is configured to be inserted into a protection block. Theinsertion portion 48 includes a plurality ofprotrusions 47 configured to interconnect with a connection block and retain theovervoltage protection plug 10 within the block. Thechassis 14 also includes aninterior portion 50 that resides within thehousing 16 and is configured to allow mounting of electrical components, such as thegas tube 36, groundingplate 42, andconductive contacts interior portion 50 includestabs 30 along a perimeter portion arranged to interconnect with theopenings 32 in the housing to form a snap-fit construction. In the embodiment shown, twotabs 30 are located on the left and right sides of thechassis 14; however, more or fewer tabs can be included on thechassis 14 as well. - The
chassis 14 includesslots 52 extending through thechassis 14 from theinterior portion 50 toward left and right sides of theinsertion portion 48. Theslots 52 are sized to receive theconductive contacts insertion portion 48 external to thebody 12 while electrically connecting to thegas tube 34 within theinterior volume 34. Theinsertion portion 48 also includes acentral guide extension 49 that physically and electrically separates theconductive contacts - The chassis also includes a central
pin receiving slot 54 normal to theslots 52 and arranged to accept insertion of thegrounding pin 40 of thegas tube 36, for connection to thegrounding plate 42.Tabs 56 on a top side of thechassis 14 define a mounting location for the grounding plate, and retain thegrounding plate 42 in place when theovervoltage protection plug 10 is assembled. In the embodiment shown, thechassis 14 includes the gel access opening 46 located below theinsertion portion 48, as previously described. - Referring now to
FIGS. 26-32 , aspects of thehousing 16 are described in greater detail. Thehousing 16 defines a portion of thebody 12 including at least a portion of the left andright sides handle side 24 of the body. Thehousing 16 defines theinterior volume 34, and includes an opening 35 that is sized to receive thechassis 14 and associated internal electrical components (e.g. agas tube 36, groundingplate 42, andconductive contacts 26, 28). In the embodiment shown, thehousing 16 is generally rectangular, but includesangled corners 58 connecting thebottom side 15 to the left andright sides - The
housing 16 includestab receiving openings 32 near the opening 35 that are configured to receive thetabs 30 of the chassis to form a snap-fit connection. Theopenings 32 are generally numbered and positioned in a manner complementary to thetabs 30, such that each tab has a corresponding opening. - The
housing 16 defines ahandle 60 shaped to be manually gripped for insertion and removal of the overvoltage protection plug 10 from a socket, connection block, or other insertion location. Thehandle 60 includes a plurality ofridges 61 to assist with manual gripping of theplug 10. Thehandle 60 can also be shaped to accept use of a punch down tool for insertion or removal of theplug 10. For example, the handle can include a hook-shaped portion for receiving a portion of such a tool. The punch down tool (not shown) can be used to insert or remove theovervoltage protection plug 10, due in part to the sizing and positioning of thehandle 60 at the handle portion of thehousing 16, extending rearwardly from the plug. As described above, an example punch down tool can be any of a variety of tools include a gripping portion (for example, a hook), such as a punch down tool distributed by ADC Krone GmbH. An example punch down tool is described in U.S. Pat. No. 4,434,542, the disclosure of which is hereby incorporated by reference in its entirety. - Referring now to
FIGS. 33-37 , additional details of thegas tube 36 are shown. Thegas tube 36 is a three-pin gas tube, and, as previously mentioned, includes two signal leads 38 and agrounding pin 40. Thegas tube 36 is generally cylindrical, and the signal leads 38 extend from opposing ends of the cylinder. Thegrounding pin 40 extends from a central location along the cylindrical shape of thegas tube 36. - The
gas tube 36 can be any of a variety of sizes. In various embodiments, thegas tube 34 is a gas discharge tube rated to meet electrical specifications of Underwriter's Laboratories, Telcordia, or another electrical safety specification appropriate to the region in which theplug 10 is used. Such gas discharge tubes can be any of a number of gas tubes manufactured by Bourns or other gas discharge tube manufacturer. In the embodiment shown, the gas tube has a diameter of approximately 5 mm. However, other sizes of gas tubes may be used as well to ensure that the necessary electrical specifications are met for use of theplug 10. - Optionally, the
gas tube 36 includes amelt element 62 along the length of the tube. The melt element operates to permanently connect the signal leads 38 to thegrounding pin 40 if a prolonged overvoltage event is detected. In the case of such an event, thegas tube 36 is activated for a long period of time, causing the temperature of the gas tube to rise, melting the melt element and causing a short circuit between the signal leads 38 and thegrounding pin 38. - Now referring to
FIGS. 38-51 , features of theconductive contacts conductive contact 26, shown inFIGS. 38-44 , connects from thesignal lead 38 of thegas tube 36 that resides within thehousing 16 nearer to thehandle 60, and extends through thechassis 14 to be exposed along the right side of the insertion portion. Theconductive contact 26 includes aconnection portion 27 configured for electrical connection to asignal lead 38 from thegas tube 36, and alead portion 29 configured to extend through theslot 54 in the chassis. The secondconductive contact 28, shown inFIGS. 45-51 , includes acorresponding connection portion 27′ andlead portion 29′ connects from thesignal lead 38 of thegas tube 36 that is nearer to the insertion portion through the chassis, and is exposed along the left side of the insertion portion. Theconductive contacts connection portions 27, 31. -
FIGS. 52-58 illustrate additional details of thegrounding plate 42 mounted to thechassis 14 within thebody 12. The groundingplate 42 includes agrounding extension 64 connected to aconnection portion 66, which includes aconnection location 68 for electrically connecting the grounding plate to thegrounding pin 40 of thegas tube 36. In the embodiment shown, the connection portion is substantially rectangular, to be held in place by thetabs 56 on the top side of the chassis. In the embodiment shown, theconnection location 68 includes an H-clip configuration, forming a solderless electrical connection to thegrounding pin 40 of thegas tube 36. However, in other embodiments a soldered connection could be used instead. - Referring now to the disclosure generally, to construct an
overvoltage protection plug 10 such as is disclosed herein, an example process follows. A manufacturer can mount a gas tube to a chassis, such as by sliding one or more pins of the gas tube (e.g. thegrounding pin 40 or signal leads 38) into a slot of the chassis arranged to accommodate the gas tube. Metallic leads, such as theconductive contacts gas tube 36, and inserted through slots in the chassis to extend toward an insertion side of the chassis. For example, theconductive contacts gas tube 36. - A grounding
plate 42 is electrically connected to thegrounding pin 40 of thegas tube 36. The grounding plate is installed over the grounding pin, optionally such that a portion of thechassis 14 resides between the groundingplate 42 and thegas tube 36. - The
interior portion 50 of thechassis 14, including the installedgas tube 36, groundingplate 42, and portions of theconductive contacts housing 16 to form a snap-fit connection, forming theovervoltage protection plug 10. The interior volume of the formedplug 10 can be filled with a gel, such as by inserting the gel through a gel access opening in thebody 12 of the plug. The gel surrounds thegrounding plate 42,conductive contacts gas tube 36, to environmentally protect the electrical components from moisture or other harmful external conditions. - In operation, the
overvoltage protection plug 10 is inserted into a connection block, thereby connecting two sets of contacts for a differential signal pair routed through the connection block. Theovervoltage protection plug 10 detects overvoltage events, representing instances in which the voltage difference across the differential pair exceeds an acceptable, preset threshold value. When the voltage difference exceeds this threshold value (as determined by the specific voltage characteristics of the selected gas tube), one or both of the signal leads of the gas tube are shorted to the grounding pin of the gas tube, as described above in conjunction withFIGS. 33-37 , thereby protecting an overall differential signaling circuit. - One example of a similar overvoltage protection plug that has analogous functionality is described in U.S. patent application Ser. No. 11/712,234, filed Feb. 28, 2007, and entitled “Overvoltage Protection Plug”, the entire disclosure of which is hereby incorporated by reference in its entirety.
- Now referring to
FIGS. 59-66 , certain optional additional features for an alternative construction of anovervoltage protection plug 100 are shown. Theovervoltage protection plug 100 generally includes corresponding features and functionality to plug 10 ofFIGS. 1-58 , and further includes test access openings in thehousing 14 andchassis 16. The test access openings, described in further detail below, allow access to signals protected byplug 100 by a technician (e.g., while the plug is installed in a connection block). - In the embodiment shown,
contacts contacts FIGS. 1-58 , and include testaccess lead portions 126′, 128′, respectively, extending to the handle side of theinterior volume 34 of thehousing 14. In the embodiment shown, the testaccess lead portions 126′, 128′ are formed from an elongated metal contact folded upon itself and extending to thehandle side 24 of the plug 100 (as compared tocontacts 26, 28). A pair of test access openings 102 a-b are located in thehandle 60 of thehousing 14, and allow a technician to accesscontacts - Additionally, a ground access opening 104 is located through the
chassis 16 proximate to theprotrusions 47, and allows connective test access to a grounding bar connected to thegrounding plate 42 when theplug 100 is inserted into a connection block. In the embodiment shown, the ground access opening 104 extends through the chassis such that grounding access is available from either side of theplug 100. - Although certain particular methods of construction and operation of an overvoltage protection plug are described herein, other methods of construction and operation are possible as well. Furthermore, the various steps described to construct an overvoltage protection plug are not required to be performed in a specific order, and no order is imputed by this description.
- Furthermore, it is noted that, although in the foregoing description of the
overvoltage protection plug 10 terms such as, “top”, “bottom”, and “side” and words related thereto are used for ease of description and illustration, no restriction is intended by use of such terms. Theplug 10 can be positioned in any orientation. - The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.
Claims (36)
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US12/473,087 US8411404B2 (en) | 2008-05-27 | 2009-05-27 | Overvoltage protection plug |
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US5632808P | 2008-05-27 | 2008-05-27 | |
US12/473,087 US8411404B2 (en) | 2008-05-27 | 2009-05-27 | Overvoltage protection plug |
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US20090296303A1 true US20090296303A1 (en) | 2009-12-03 |
US8411404B2 US8411404B2 (en) | 2013-04-02 |
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JP2012109162A (en) * | 2010-11-18 | 2012-06-07 | Yazaki Corp | Connection structure of electronic component |
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US8192235B2 (en) | 2004-12-22 | 2012-06-05 | Adc Gmbh | Cable connector for printed circuit boards |
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US8064182B2 (en) | 2007-02-28 | 2011-11-22 | Adc Telecommunications, Inc. | Overvoltage protection plug |
US9865995B2 (en) | 2007-02-28 | 2018-01-09 | Commscope Technologies Llc | Overvoltage protection plug |
US7946863B2 (en) | 2008-04-25 | 2011-05-24 | Adc Telecommunications, Inc. | Circuit protection block |
US20120029853A1 (en) * | 2011-05-16 | 2012-02-02 | General Electric Company | System, device, and method for detecting electrical discharges on a structure |
US8239150B2 (en) * | 2011-05-16 | 2012-08-07 | General Electric Company | System, device, and method for detecting electrical discharges on a structure |
EP2743961A1 (en) | 2012-12-17 | 2014-06-18 | Keithley Instruments, Inc. | High voltage protection module |
US20160020605A1 (en) * | 2013-04-02 | 2016-01-21 | Pivot Electronics Pty Ltd | Surge reduction filter |
US10027108B2 (en) * | 2013-04-02 | 2018-07-17 | Pivot Electronics Pty Ltd | Surge reduction filter |
US10170904B2 (en) | 2013-04-02 | 2019-01-01 | Pivot Electronics Pty Ltd | Surge reduction filter |
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